ESB-2017.2819 - [Appliance] F5 Products: Denial of service - Remote/unauthenticated 2017-11-03

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2819
                K02138183: BIND vulnerability CVE-2016-9147
                              3 November 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-9147  

Reference:         ESB-2017.2080
                   ESB-2017.1626
                   ESB-2017.0964
                   ESB-2017.0710
                   ESB-2017.0126

Original Bulletin: 
   https://support.f5.com/csp/article/K02138183

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Final - K02138183: BIND vulnerability CVE-2016-9147

Security Advisory

Original Publication Date: Jan 13, 2017
Updated Date: Nov 02, 2017

Applies to (see versions):

  o Product: BIG-IQ, BIG-IQ Cloud, BIG-IQ Device, BIG-IQ Security, BIG-IQ ADC,
    BIG-IQ Centralized Management
      5.1.0, 5.0.0, 4.6.0, 4.5.0, 4.4.0, 4.3.0, 4.2.0, 4.1.0, 4.0.0
  o Product: BIG-IP, BIG-IP AAM, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM,
    BIG-IP ASM, BIG-IP DNS, BIG-IP Edge Gateway, BIG-IP GTM, BIG-IP Link
    Controller, BIG-IP LTM, BIG-IP PEM, BIG-IP PSM, BIG-IP WebAccelerator
      13.0.0, 12.1.2, 12.1.1, 12.1.0, 12.0.0, 11.6.1, 11.6.0, 11.5.4, 11.5.3,
      11.5.2, 11.5.1, 11.5.0, 11.4.1, 11.4.0, 11.2.1
  o Product: Enterprise Manager
      3.1.1
  o Product: F5 iWorkflow
      2.0.2, 2.0.1, 2.0.0
  o Product: LineRate
      2.6.1, 2.6.0, 2.5.2, 2.5.1, 2.5.0
  o Product: ARX, ARX
      6.4.0, 6.3.0, 6.2.0
  o Product: F5 WebSafe
      1.0.0
  o Product: Traffix SDC
      5.1.0, 4.4.0, 4.0.5, 4.0.2, 4.0.0
  o Product: BIG-IQ Cloud and Orchestration
      1.0.0

The security issue described in this article has been resolved or does not
affect any F5 products. There will be no further updates, unless new
information is discovered.

Security Advisory Description

named in ISC BIND 9.9.9-P4, 9.9.9-S6, 9.10.4-P4, and 9.11.0-P1 allows remote
attackers to cause a denial of service (assertion failure and daemon exit) via
a response containing an inconsistency among the DNSSEC-related RRsets. (
CVE-2016-9147)

Impact

When the BIND recursion option is enabled, an attacker can exploit this
vulnerability to cause the named process to restart. Additionally, the
restarted process does not trigger the BIG-IP system high availability (HA)
failover event.

By default, the BIND recursion option is not enabled on BIG-IP DNS systems. If
the BIND recursion option is enabled, BIG-IP DNS systems are vulnerable.

Security Advisory Status

F5 Product Development has assigned ID 636700 (BIG-IP) to this vulnerability.

To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:

+---------------+----------------+-----------------+----------+----------------+
|               |Versions known  |Versions known to|          |Vulnerable      |
|Product        |to be vulnerable|be not vulnerable|Severity  |component or    |
|               |                |                 |          |feature         |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP LTM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP AAM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP AFM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP         |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|Analytics      |                |11.4.0 - 11.6.1  |          |                |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP APM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP ASM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP DNS     |13.0.0          |13.0.0 HF1       |High      |BIND            |
|               |                |12.0.0 - 12.1.2  |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Edge    |None            |11.2.1           |Not       |None            |
|Gateway        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP GTM     |None            |11.4.0 - 11.6.1  |Not       |None            |
|               |                |11.2.1           |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP Link    |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|Controller     |                |11.4.0 - 11.6.1  |          |                |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP PEM     |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.4.0 - 11.6.1  |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PSM     |None            |11.4.0 - 11.4.1  |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |None            |11.2.1           |Not       |None            |
|WebAccelerator |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|               |                |13.0.0 HF1       |          |                |
|BIG-IP WebSafe |13.0.0          |12.0.0 - 12.1.2  |High      |BIND            |
|               |                |11.6.0 - 11.6.1  |          |                |
+---------------+----------------+-----------------+----------+----------------+
|ARX            |None            |6.2.0 - 6.4.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Enterprise     |None            |3.1.1            |Not       |None            |
|Manager        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |None            |4.0.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Device  |None            |4.2.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Security|None            |4.0.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ ADC     |None            |4.5.0            |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ         |                |5.0.0 - 5.1.0    |Not       |                |
|Centralized    |None            |4.6.0            |vulnerable|None            |
|Management     |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |                |                 |Not       |                |
|and            |None            |1.0.0            |vulnerable|None            |
|Orchestration  |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|F5 iWorkflow   |None            |2.0.0            |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|LineRate       |None            |2.5.0 - 2.6.1    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Traffix SDC    |None            |4.0.0 - 5.1.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+

Security Advisory Recommended Actions

If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Versions known to be not vulnerable column. If the table lists only an
older version than what you are currently running, or does not list a
non-vulnerable version, then no upgrade candidate currently exists.

Mitigation

To mitigate this vulnerability, you can disable the recursion option in the
BIND configuration (if it is not required for your environment). To do so,
perform the following procedure.

Impact of procedure: This procedure disables the recursion feature in the BIND
configuration and restarts the system service; this interruption may affect the
BIG-IP system responding to DNS queries. F5 recommends that you perform this
procedure during a scheduled maintenance period.

 1. Log in to the Advanced Shell (bash) of the BIG-IP system as the root user.
 2. To verify that the system has recursion enabled for the named service, type
    the following command:

    grep "recursion\ " /var/named/config/named.conf

    If the output displays "recursion yes," proceed to step 4.

 3. To verify that the system has recursion enabled for the dnscached service,
    type the following command:

    grep "recursion\ " /var/dnscached/config/named.conf

    If the output displays "recursion yes," proceed to step 4.

    Note: The /var/dnscached/config/named.conf configuration file is valid only
    if the BIG-IP system is provisioned, or was previously provisioned, with
    the BIG-IP APM module.

 4. Use an editor of your choice to remove the following lines from the target
    configuration file:

     recursion yes;
     allow-recursion { <IP-Addresses-ACL> };

 5. Optional: If you have more than one file to edit, after evaluating the
    files in step 2 and step 3, repeat step 4 for the next configuration file.
 6. Optional: If you have modified the configuration of the dnscached service
    in step 4, you must restart the dnscached service by typing the following
    command:

    tmsh restart /sys service dnscached

 7. Optional: If you have modified the configuration of the named service in
    step 4, you must restart the named service by typing the following command:

    tmsh restart /sys service named

Supplemental Information

  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K167: Downloading software and firmware from F5
  o K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
  o K9502: BIG-IP hotfix matrix

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